CVE-2021-34715

A vulnerability in the image verification function of Cisco Expressway Series and Cisco TelePresence Video Communication Server (VCS) could allow an authenticated, remote attacker to execute code with internal user privileges on the underlying operating system. The vulnerability is due to insufficient validation of the content of upgrade packages. An attacker could exploit this vulnerability by uploading a malicious archive to the Upgrade page of the administrative web interface. A successful exploit could allow the attacker to execute code with user-level privileges (the _nobody account) on the underlying operating system.

CVSS v3 7.2 HIGH
CVSS v2.0 9.0 HIGH

7.2^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.2 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

9.0^/10

CVSS v2.0 : HIGH

Vector : AV:N/AC:L/Au:S/C:C/I:C/A:C

Exploitability : 8.0 / Impact : 10.0

Access Vector NETWORK

Access Complexity LOW

Authentication SINGLE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ewver-c6WZPXRx	Patch Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:cisco:expressway::::::::
	cpe:2.3:a:cisco:telepresence_video_communication_server::::::::

History

No history.

Information

Published : 2021-08-18 20:15

Updated : 2024-02-28 18:28

NVD link : CVE-2021-34715

Mitre link : CVE-2021-34715

CVE.ORG link : CVE-2021-34715

JSON object : View

Products Affected

cisco

expressway
telepresence_video_communication_server

CWE

CWE-347

Improper Verification of Cryptographic Signature

{"id": "CVE-2021-34715", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 9.0, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:S/C:C/I:C/A:C", "authentication": "SINGLE", "integrityImpact": "COMPLETE", "accessComplexity": "LOW", "availabilityImpact": "COMPLETE", "confidentialityImpact": "COMPLETE"}, "acInsufInfo": false, "impactScore": 10.0, "baseSeverity": "HIGH", "obtainAllPrivilege": false, "exploitabilityScore": 8.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.2, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "HIGH", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.2}, {"type": "Secondary", "source": "ykramarz@cisco.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.7, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "HIGH", "confidentialityImpact": "LOW"}, "impactScore": 3.4, "exploitabilityScore": 1.2}]}, "published": "2021-08-18T20:15:07.150", "references": [{"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ewver-c6WZPXRx", "tags": ["Patch", "Vendor Advisory"], "source": "ykramarz@cisco.com"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-347"}]}, {"type": "Secondary", "source": "ykramarz@cisco.com", "description": [{"lang": "en", "value": "CWE-347"}]}], "descriptions": [{"lang": "en", "value": "A vulnerability in the image verification function of Cisco Expressway Series and Cisco TelePresence Video Communication Server (VCS) could allow an authenticated, remote attacker to execute code with internal user privileges on the underlying operating system. The vulnerability is due to insufficient validation of the content of upgrade packages. An attacker could exploit this vulnerability by uploading a malicious archive to the Upgrade page of the administrative web interface. A successful exploit could allow the attacker to execute code with user-level privileges (the _nobody account) on the underlying operating system."}, {"lang": "es", "value": "Una vulnerabilidad en la funci\u00f3n de comprobaci\u00f3n de imagen de Cisco Expressway Series y Cisco TelePresence Video Communication Server (VCS) podr\u00eda permitir a un atacante autenticado remoto ejecutar c\u00f3digo con privilegios de usuario interno en el sistema operativo subyacente. La vulnerabilidad es debido a que no se comprueba suficientemente el contenido de los paquetes de actualizaci\u00f3n. Un atacante podr\u00eda explotar esta vulnerabilidad cargando un archivo malicioso en la p\u00e1gina de actualizaci\u00f3n de la interfaz web administrativa. Una explotaci\u00f3n con \u00e9xito podr\u00eda permitir al atacante ejecutar c\u00f3digo con privilegios de nivel de usuario (cuenta the _nobody) en el sistema operativo subyacente."}], "lastModified": "2023-11-07T03:36:10.637", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:cisco:expressway:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "5DE7016D-2F6F-410F-B9A4-946E6A30F871", "versionEndIncluding": "x8.8.0"}, {"criteria": "cpe:2.3:a:cisco:telepresence_video_communication_server:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "93C89023-B05D-4E49-ABAD-993C0D5A0357", "versionEndIncluding": "x8.8"}], "operator": "OR"}]}], "sourceIdentifier": "ykramarz@cisco.com"}